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Metal surface degreasing agent and application method thereof

A metal surface and degreasing agent technology, which is applied in the field of metal surface degreasing agent for cleaning oil well pipe couplings, can solve the problems of long degreasing time, high price, and large corrosion of workpieces, and achieves simple composition, convenient preparation, and high cleaning rate Effect

Inactive Publication Date: 2009-09-02
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method has better degreasing effect, the alkaline degreasing agent commonly used in industry contains 40-50% NaOH and 20-40% NaOH 2 CO 3 , expensive and highly corrosive to the workpiece, long degreasing time (generally 25-40 minutes, longer time for heavy dirt parts), and needs to be heated to 85 ° C ~ 95 ° C, high energy consumption, solvent vapor pollutes the environment, requires Use expensive methods to deal with, in order to meet the requirements of environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Take 5Kg metal surface degreasing agent as an example (by weight percentage):

[0015] Na 2 CO 3 : 40%

[0016] Na 5 PO 10 : 10%

[0017] Na 3 PO 4 12H 2 O: 30%

[0018] Anionic surfactant: sodium dodecylbenzenesulfonate 14%

[0019] Non-ionic surfactant: fatty alcohol polyoxyethylene ether 3% + polyethylene glycol octylphenyl ether 3%.

[0020] After the above ingredients are fully mixed, the finished metal surface degreasing agent is 5kg. Get the finished product and add 95Kg deionized water to be the metal surface degreasing agent solution. Take the machined pipe joint (with emulsion and oil on the surface), soak it in the above-mentioned metal surface degreasing agent solution at room temperature for 5 minutes, and take it out. Observe that a continuous water film can be formed on the inner thread surface of the pipe joint, indicating that it has been completely cleaned. After phosphating treatment, a uniform and dense phosphating film can be formed.

Embodiment 2

[0022] Take 10Kg metal surface degreasing agent as an example (by weight percentage):

[0023] Na 2 CO 3 : 10%

[0024] Na 5 PO 10 : 30%

[0025] Na 3 PO 4 12H 2 O: 40%

[0026] Anionic Surfactant: Sodium Lauryl Sulfate 20%

[0027] Non-ionic surfactant: fatty alcohol polyoxyethylene ether 5% + polyethylene glycol octylphenyl ether 5%.

[0028] After fully mixing the above ingredients, the finished metal surface degreasing agent is 10kg. Get the finished product and add 90Kg deionized water to be the metal surface degreasing agent solution. Take the machined pipe joint (with emulsion and oil on the surface area), soak it in the above metal surface degreasing agent solution at room temperature for 10 minutes, and take it out. Observe that a continuous water film can be formed on the inner thread surface of the pipe joint, indicating that it has been completely cleaned. After phosphating treatment, a uniform and dense phosphating film can be formed.

Embodiment 3

[0030] Take 3Kg metal surface degreasing agent as an example (by weight percentage):

[0031] Na 2 CO 3 35%

[0032] Na 5 P 3 o 10 25%

[0033] Na 3 PO 4 12H 2 O 30%

[0034] Anionic surfactant: sodium dodecylbenzenesulfonate 7%

[0035] Non-ionic surfactant: fatty alcohol polyoxyethylene ether 3%.

[0036] After the above ingredients are fully mixed, the finished metal surface degreasing agent is 3kg. Get finished product and add 97Kg deionized water to be metal surface degreasing agent solution. Take the pipe joint that has been machined (with emulsion and oil on the surface), soak it in the above metal surface degreasing agent solution at room temperature for 20 minutes, and take it out. Observe that a continuous water film can be formed on the inner thread surface of the pipe joint, indicating that it has been completely cleaned. After phosphating treatment, a uniform and dense phosphating film can be formed.

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PUM

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Abstract

The invention relates to a metal surface degreasing agent, which comprises the following chemical compositions by weight percentage: 10 to 40 of Na2CO3, 5 to 30 of Na5P3O10, 10 to 40 of Na3PO4 12H2O, 3.5 to 20 of anionic surfactant, and 0.5 to 10 of nonionic surfactant. The anionic surfactant can be sodium dodecyl benzene sulfonate or sodium dodecyl sulfate. The nonionic surfactant can be one or two of alkylpolyoxyethylene ether and polyethylene glycol octyl phenyl ether, when two nonionic surfactants are used, the weight percentage of the two is 1 to 1. The invention also provides an application method of the metal surface degreasing agent. The metal surface degreasing agent has simple compositions, convenient preparation, and high washing rate, and can be used at room temperature.

Description

technical field [0001] The invention relates to a metal surface degreasing agent and a using method thereof, in particular to a metal surface degreasing agent for cleaning oil well pipe couplings and a using method thereof. Background technique [0002] During the processing of metal parts, most of them use oil-based lubricants and similar substances, which will leave oil stains on the surface of metal parts. Metal parts need to remove these oil stains before surface treatment (such as electroplating, phosphating treatment, coating treatment, etc.) or before final use. [0003] Metal surface degreasing agents for removing oil stains include dichloromethane, gasoline, sodium hydroxide, etc. When oil stains are difficult to deal with, steam degreasing is usually used. Vapor degreasing involves exposing metal parts to continuously refluxing vapors of a degreasing agent. Although this method has better degreasing effect, the alkaline degreasing agent commonly used in industry ...

Claims

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Application Information

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IPC IPC(8): C23G1/24
Inventor 马刘宝朱靖
Owner BAOSHAN IRON & STEEL CO LTD
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